( 354 ) 



(PI. LIII. f. T) of the same tyjie as in }fa(lor;/x, the apical edge dentate at the 

 left and right side as sliown in iigure. 



?. Eighth tergite sinuate; membranaceous mesially. Vaginal plate jiitchy 

 black, large, connecting membrane between vaginal plate and seventh sternite 

 long, transversely folded ; vaginal plate very uneven, a ridge or carina proximally 

 of the ovate orifice, curving distad laterally, limiting a broad lateral groove ; two 

 smaller grooves behind the orifice, separated by a carinated fold. Seventh sternite 

 longer than basally broad. 



llah. Tropical and Subtropical America : Florida, AVest Indies, southward to 

 Paraguay and Southern Brazil. 



Very common. 



In the Tring Museum 2 larvae, 1 pupa, 200 odd specimens from : Jamaica ; 

 Haiti ; Cuba ; Mexico southwards to Bolivia and Rio de Janeiro. 



LXXXIX. ISOGNATHUS.— Typus : .scy/m. 



Sphinx Linn^, Mus. Lull. Dlr. p. 350 (1764) (partim). 

 Erimii/is Hiibner, Verz. bek. Schm. p. 139 (1822) (partim ; type : cUn). 

 DilnplmiKiki Buraieister, tiphing. Bran. p. 68 (1856) (partim ; type : ello). 

 Aiicentj- Walker, Lixl Lep. Iii.t. B. M. viii. p. 222 (I85G) (partim ; type : piiinstri). 

 hiignathiis Felder, Wieii. Eiit. Moiiatschi: vi. p. 187 (1862) (type : .tci/rmi). 

 Tatoglussuni Butler, Trans. Zuol. Hoc. Loud. ix. p. 598 (1877) (type : caricae). 



c?¥. Agreeing closely with Pseudosphinx and Erinnyis; robust; crest of 

 thorax small ; crest of occiput not divided ; second abdominal tergite tufted above 

 (in well preserved individuals), seventh tergite and sternite of ¥ shorter than 

 basally broad ; process of tenth sternite of <J a little shorter than the tergite ; harpe 

 transversely ribbed (PI. XLV. f. 2;")) ; R' and M' of hindwing less close together 

 than in Erinni/is. 



Caterpillar as in Pseudosphinx ; body yellow or white, marked with various 

 designs in black, sometimes appearing black with ])ale rings ; horn long and thin, 

 rough with setiferous tubercles, which are dense distally (in all species ?) ; anal 

 tergite without the two high tubercles of Pseudosphinx. — Food-plants : Plumeria 

 and other EKphorhiareae. 



Pupa stouter tiuin in Eri/un/is, paler, the black streaks more conspicuous 

 (Burmeister's figure correct?; his '' sri/roii" pupa is darker in colour than the two 

 Erinin/is-\mita,ii figured on the same ])late). 



Bab. Tropical and Subtropical America, from Mexico to Buenos Aires ; Cuba, 

 Haiti, Porto Rico. 



The sexual armature does not jiresent any apparent differences in the various 

 species, which are partly difficult to distinguish. 



Key to the species : 



a. Veins of hindwing above striped vvitii black 



in outer half ...... 201. I. caricae. 



Veins of hindwing above not striped with 



black in outer half b. 



b. Abdomen not distinctly banded . . . . c. 

 Abdomen witli black and whitish grey bands . d. 



c. Sjiot in ajiex of cell ol forewing and dot 



outside h' distinctly separate . . . 284. /. leacki. 



